John s



N0. 6l0,085. Patented Aug. 30, I893.

. J. S. L. BDDRlCK.

FURNACE.

(Application filed Max: 12, 1898.)

(No Model.)

WITNESSES 4 mad /N VEN TOR fihn 5.1

BY W

ATTORNEYS.

JOHN S. L. RODRIOK, OF WASHINGTON, DISTRICT. OF COLUMBIA.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 610,085, dated August 30, I898. Afiiugatgmmmfitlz,1898, sesame. 673,603. (No model.)

To all whom it may concern.-

Be it known that I, JOHN S. L. RODRICK, a

' citizen of the United States,residing at \Vashington, in the District of Columbia, have invented certain new and useful Improvements in Hot-Air Furnaces, of which the following is a full, clear, and exact specification.

My invention relates to hot-air heating apparatus, and has for an object to provide means whereby a common (it may be said an almost universal) objection to hot-air furnaces is avoided in a simple and economical manner.

In the use of hot-air furnaces the general experience is that it is practically impossible to heat some certain room or rooms without turning the entire heat therein, and thus robbing the other fiues of their share of the hot air. I avoid this objection by furnishing means by which a superheated portion of air is directed up the flue desired and operates not only to aid the heating by such superheated air, but also to induce a current ofhot air from the hot-air chamber up such particular flue for the purpose of heating the room to which the flue leads.

\Vith this object in View my invention consists in certain novel constructions and combinations of parts, as will be hereinafter de scribed, and pointed out in the claims.

In the drawings, Figure l is an elevation, partly in section, showing my improvement as in use. Fig. 2 is a perspective view of the improved devices, and Fig. 3 is a diagrammatic view illustrating the invention in connection with two hot-air flues.

In carrying out my invention I provide, in connection with the furnace A and its hot-air flue B, a superheating-box 0, having a de livery-tube E, which leads into the hot-air flue and is spaced therefrom, preferably by means of the radial lugs D, in such manner as to permit the hot air from the hot-air chamber F to pass up the flue B alongside the delivery-tube E. The superheating-box C is open at one side, fits at such side against the combustion-chamber A, slopes inward at its lower end at C, and is provided at such end with an air-inlet opening 0, where it receives the air from the hot-air space of the furnace.

The inwardly-sloping end 0 is desirable, because by it the air entering the superheatingbox is caused to pass close to the combustionchamber, and ample room for the expansion of such air within the superheating-box is provided. At its open side the superheatingbox is conformed to the shape of the combustion-chamber and is provided at such side with shoulders 0 which fit upon the rib or flange A of the combustion-chamber and aid in securing the superheating-box in place,

wires G or other suitable devices being provided to hold the superheating-box to the combustion-chamber, as shown in Fig.1. The delivery-tube may lead for a short distance into the hot-air flue but I prefer to extend it, in applying the improvements to hot-air fun naces already installed, to the upward bend of the hot-air flue, as will be understood from Fig. 1, while in applying the improvements to houses in the course of construction I deem it desirable to extend the deliverytube up to the hot-air register, as will be understood from Fig. 3, and it may be preferred in building to place these delivery-tubes in all the hot-air flues, as it is impossible to indicate in advance what rooms will be hard to heat, and to connect the superheating-box with any particular delivery-tube as may be required.

It will be noticed that the superheating box receives the extreme heat from the combustion-chamber, taking the air directly off the side of such chamber, and so secures the advantages of such extreme heat, as well as that which results from inducing a current up through the particular pipe leading to the room which needs especial treatment.

I find it desirable to make the superheating-box of such size that it will extend from top to bottom of the combustion-chamber and to arrange the air-inlet to such box at its lower end.

The delivery-tube carries the superheated air upward and being directed through the hot-air flue is not exposed to the loss of radiation resulting from an exposed pipe, but operates to heat the hot air flue throughout. Nor is the heat from the furnace obstructed by the delivery-tube, because there is ample space surrounding it through which the hot air will pass, each pipe thus operating to heat the other and avoiding any chilling of the dc livery tube by cold air.

By the use of my invention there will be in a short time saving of enough expense for fuel to pay the cost of the attachment.

It is found in practice that the extra heat forced into one or more flues has no effect whatever upon the other flues.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The combination in a hot-air furnace of the combustion-chamber, a superheating-box open at one side arranged in the hot-air space with the open side of the box next to and against the combustion-chamber, such box having an air-inlet and a delivery-tube lead-' ing from the box into the hot-air flue substantially as described.

2. In a hot-air furnace an attachment consisting of a box open at one side and adapted at such side to fit against the combustionchamber of the furnace and having an airinlet and the delivery-tube leading from such box and adapted to enter the hot-air flue substantially as set forth.

3. The combination in a hot-air furnace, of' the combustion-chamber abutting at one side against the vertical side of and conforming at such side to the said side of the combustion-chamber and having a delivery-tube leading into the hot-air flue, substantially as described.

4. A hot-air furnace provided with a con1- bustion-chamber, a hot-air space, and the hot-air flue or' flues, and a separate superheatin g-ch amber applicable to and alongside the said combustion-chamber and having an air-inlet and a delivery-tube extending into the hot-air flue and spaced therefrom, the superheating-chamber being movable later ally in the hot-air space, whereby it may be adjusted to discharge into any desired flue, substantially as set forth.

5. A superheating attachment for hot-air furnaces consisting of a box open at one side, adapted at such side to fit against the combustion-chamber, having its outer side at its lower end sloped inward toward the open side, and provided with a delivery-tube, substantially as set forth.

JOHN S. L. RODRICK.

Witnesses:

SoLoN C. KEMON, PERRY B. TURPIN. 

